Question

a)3/4+2/5:4/15=

b)-2/5+7/10-3/4=

c) 50%+0,75-5/3:(-2/3)2

Cần Gấp Lắm!

 

Answer 1

a) 9/4

Answer 2

b)-18/40

Answer 3

a)2,25

b)-0.45

c)6,25

Answer 4

GIẢI:A)\(\frac{3}{4}+\frac{2}{5}:\frac{4}{15}=\frac{3}{4}+\frac{3}{2}=\frac{18}{8}=\frac{9}{4}\)

B)\(\frac{-2}{5}+\frac{7}{10}-\frac{3}{4}=\frac{-8}{20}+\frac{14}{20}+\frac{15}{20}=\frac{21}{20}\)

Answer 5

fan BTS sai rồi kia câu b phép cuối là phép trừ mà

Answer 6

a)3/4+2/5:4/15

=3/4+2/5.15/4

=3/4+3/2

=9/4

b)-2/5+7/10-3/4

=3/10-3/4

=9/20

c)50%+0,75-5/3:(-2/3)2

=50/100+75/100-5/3.(-3/2)2

=50/100+75/100-(-5/2)2

=1/2+3/4-(-10/2)

=1/2+3/4+10/2

=25/4

(hông bit làm đúng không nữa)

:(

Answer 7

\(50\%+0,75-\frac{5}{3}:\left(\frac{-2}{3}\right).2=\frac{1}{2}+\frac{1}{3}-\frac{5}{3}:\frac{-4}{3}=\frac{1}{2}+\frac{1}{3}+\frac{5}{4}=\frac{21}{12}\)

Answer 8

Ngôk Kb vs mk nha